Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1987 Mercedes Benz 560SLFACTORY OEM SERVICE PROCEDURE
System Check
- Disconnect hose between purge valve and canister at canister. Place finger over hose end. Slowly increase engine speed to 3000 RPM. No vacuum should be present at idle. Vacuum should gradually increase with engine speed.
- If no vacuum was present at hose, trace hose back to throttle valve housing. Blow through connection on housing. Ensure hose is clear.
- If vacuum is still not present, remove White/Purple/Black hose from purge valve. If vacuum is now present, replace purge valve. If vacuum is not present, replace thermo valve.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.